Billy Barty (born William John Bertanzetti; October 25, 1924 – December 23, 2000) was an American actor and activist. In adult life, he stood tall because of cartilage–hair hypoplasia dwarfism and so
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d8da3d56af88ca2899f4a238075a2c83f5467909cb9586c92e3c1d8c5766d5. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11b50280-2b82-4eda-b25c-371d2986086b.json and https://artists.proofprofile.net/proofs/artist/11b50280-2b82-4eda-b25c-371d2986086b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).